By: Pep Canadell, CSIRO; Corinne Le Quéré, University of East Anglia; Glen Peters, Center for International Climate and Environment Research – Oslo, and Rob Jackson, Stanford University

For the third year in a row, global carbon dioxide emissions from fossil fuels and industry have barely grown, while the global economy has continued to grow strongly. This level of decoupling of carbon emissions from global economic growth is unprecedented.

Global CO₂ emissions from the combustion of fossil fuels and industry (including cement production) were 36.3 billion tonnes in 2015, the same as in 2014, and are projected to rise by only 0.2% in 2016 to reach 36.4 billion tonnes. This is a remarkable departure from emissions growth rates of 2.3% for the previous decade, and more than 3% during the 2000s.

Given this good news, we have an extraordinary opportunity to extend the changes that have driven the slowdown and spark the great decline in emissions needed to stabilise the world’s climate.

This result is part of the annual carbon assessment released today by the Global Carbon Project, a global consortium of scientists and think tanks under the umbrella of Future Earth and sponsored by institutions from around the world.

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Carbon dioxide emissions account for 80 percent of all greenhouse gases pumped into the environment, totaling in at a staggering 40 tons of CO₂ currently emitted from burning fossil fuels. In a response to the high levels of CO₂, which have been linked to the accelerating rates in climate change, the U.S. Environmental Protection Agency has called for a 30 percent decrease in emissions of the power sector. Former ECS member Susan Rempe is looking to help the sector achieve that goal through the development of the CO₂ Memzyme.

Researchers claim the Memzyme is the only cost-effective way to capture and process CO₂. Further, the team states that the Memzyme — which is a membrane with an active layer holding an enzyme — has prefect selectivity.

The development could help capture CO₂ from coal-fired power plants and is 10 times thinner than a soap bubble.

With atmospheric greenhouse gas levels at their highest in history, many researchers have been contemplating one question: How can we reutilize carbon dioxide?

One new study reports a new catalyst with the ability to execute highly selective conversion of carbon dioxide into ethylene, producing an important source material for the chemical industry.

The push to convert carbon dioxide into useful chemicals is not a completely novel concept among the scientific community. For this study, researchers opted to make the process more efficient by implementing a new catalyst with higher selectivity to produce more useful chemicals and less unwanted byproducts.

Ruhr-Universitӓt Bochum PhD student and ECS student member, Hemma Mistry, veered away from the traditional catalyst used in this process and instead opted for copper films treated with oxygen or hydrogen plasmas. By doing this, Mistry was able to alter surface properties for optimal performance.

(MORE: Read Mistry’s past ECS Meeting Abstract entitled, “Selectivity Control in the Electroreduction of CO₂ over Nanostructured Catalysts.”)

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Reutilizing carbon dioxide to produce clean burning fuels

David Go has always seen himself as something of a black sheep when it comes to his scientific research approach, and his recent work in developing clean alternative fuels from carbon dioxide is no exception.

In 2015, Go and his research team at the University of Notre Dame were awarded a $50,000 grant to purse innovative electrochemical research in green energy technology through the ECS Toyota Young Investigator Fellowship. With a goal of aiding scientists in advancing alternative energies, the fellowship aims to empower young researchers in creating next-generation vehicles capable of utilizing alternative fuels that can lead to climate change action in transportation.

The road less traveled

While advancing research in electric vehicles and fuel cells tend to be the top research areas in sustainable transportation, Go and his team is opting to go down the road less traveled through a new approach to green chemistry: plasma electrochemistry.

(MORE: Read Go’s Meeting Abstract on this topic, entitled “Electrochemical Reduction of CO_2(aq) By Solvated Electrons at a Plasma-Liquid Interface.”)

“Our approach to electrochemistry is completely a-typical,” Go, associate professor at the University of Notre Dame, says. “We use a technique called plasma electrochemistry with the aim of processing carbon dioxide – a pollutant – back into more useful products, such as clean-burning fuels.”

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A team of researchers from Iceland is looking to fight climate change by turning greenhouse gases into rocks.

A recent paper published in Science details how researchers have been able to capture carbon emissions and lock them in the ground, transforming them from harmful atmospheric greenhouse gases to volcanic rock.

“Our results show that between 95 and 98 percent of the injected carbon dioxide was mineralized over the period of less than two years, which is amazingly fast,” said lead author Juerg Matter.

A large majority of all electricity in Iceland come from geothermal energy. While geothermal may seem like a very clean source of energy, it is not carbon dioxide independent.

In fact, the geothermal energy of Iceland produces 40,000 pounds of carbon dioxide every year. That is only about five percent of what a fossil fuel plant of the same size would emit, but research team is looking to work toward a completely carbon dioxide independent economy.

Upcycling has become a huge trend in recent years. People are reusing and repurposing items that most wouldn’t give a second glance, transforming them into completely new, high-quality products. So what if we could take that same concept and apply it to the greenhouse gas emissions in the environment that are accelerating climate change?

An interdisciplinary team from UCLA is taking a shot at upcycling carbon dioxide by converting it into a new building material named CO₂NCRETE, which could be fabricated by 3D printers.

“What this technology does is take something that we have viewed as a nuisance – carbon dioxide that’s emitted from smokestacks – and turn it into something valuable,” says J.R. DeShazo, senior member of the research team.

The fact that the team is attempting to produce a concrete-like material is also important. Currently, the extraction and preparation of building materials like concrete is responsible for 5 percent of the world’s greenhouse gas emissions. The upcycling of carbon could cut that number drastically all while reducing the enormous emissions being released from power plants (30 percent of the world’s emissions).

“We can demonstrate a process where we take lime and combine it with carbon dioxide to produce a cement-like material,” says Gaurav Sant, lead scientific contributor. “The big challenge we foresee with this is we’re not just trying to develop a building material. We’re trying to develop a process solution, an integrated technology which goes right from CO₂ to a finished product.”

In an effort to convert carbon dioxide into carbon dioxide, researchers have developed an electrode in the form of a hollow porous coper fiber that completes this transformation at an extremely efficient level.

The researchers, including ECS member Marc T.M. Koper, believe that this development could give the industrial industry an edge, where it would be extremely beneficial for chemical processes that require gas conversion.

(MORE: Read additional research by Koper.)

The process is not confined to the conversion of carbon dioxide to carbon monoxide, however. Because the manufacturing method is suited for other fibers, it could also be applied to the conversion of oxygen in a fuel cell or hydrogen conversion in the electrochemical production of ammonia.

While the principal idea behind the process is straightforward, the efficiency and selectivity of the reaction is the surprising factor.

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An interdisciplinary team, including 32 year ECS member Stuart Licht and ECS student member Matthew Lefler, has developed a way to make electric vehicles that are not only carbon neutral, but carbon negative – capable of reducing the amount of atmospheric carbon dioxide as they operate by transforming the greenhouse gas.

By replacing the graphite electrodes that are currently being used in the development of lithium-ion batteries for electric cars with carbon materials recovered from the atmosphere, the researchers have been able to develop a recipe for converting collected carbon dioxide into batteries.

This from Vanderbilt University:

The team adapted a solar-powered process that converts carbon dioxide into carbon so that it produces carbon nanotubes and demonstrated that the nanotubes can be incorporated into both lithium-ion batteries like those used in electric vehicles and electronic devices and low-cost sodium-ion batteries under development for large-scale applications, such as the electric grid.

Read the full article.

The research is not the first time scientists have shown progress in collecting and converting harmful greenhouse gases from the environment.

Typically, carbon dioxide conversion revolves around transforming the gas into low-value fuels such as methanol. These conversions often do not justify the costs.

(MORE: Read “Carbon Nanotubes Produced from Ambient Carbon Dioxide for Environmentally Sustainable Lithium-Ion and Sodium-Ion Battery Anodes.“)

However, the new process produces better batteries that are not only expected to be efficient, but also cost effective.

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Globally, carbon dioxide is the number one contributor to harmful greenhouse gas emissions. These emissions accelerate climate change, leading to such devastating effects as rising sea levels that can dislocate families and radical local climates that hurt food production levels.

But what if we could turn those harmful emissions into useable fuels through a simple, one-step process?

Researchers have proven that through a process combining concentrated light, heat, and high pressure, carbon dioxide and water could be directly converted into usable liquid hydrocarbon fuels.

Not only would this effort offer some relief in the energy infrastructure, it would also aid efforts against climate change by removing carbon dioxide from the atmosphere.

“Our process also has an important advantage over battery or gaseous-hydrogen powered vehicle technologies as many of the hydrocarbon products from our reaction are exactly what we use in cars, trucks and planes, so there would be no need to change the current fuel distribution system,“ said Frederick MacDonnell, co-principal investigator of the project.

The corresponding paper was published in the Proceedings of the National Academy of Sciences.

“We are the first to use both light and heat to synthesize liquid hydrocarbons in a single stage reactor from carbon dioxide and water,” said Brian Dennis, co-principal investigator of the project. “Concentrated light drives the photochemical reaction, which generates high-energy intermediates and heat to drive thermochemical carbon-chain-forming reactions, thus producing hydrocarbons in a single-step process.”

The capture and recycling of carbon dioxide in the atmosphere may be the first stop toward a “methanol economy.”

For the first time, researchers have successfully proven that carbon dioxide captured from the environment can be transformed into methanol. This not only removes damaging carbon dioxide emissions, but also produces an exciting alternative fuel. For some, this is an inevitable step toward an economy where fuel and energy storage would be primarily based on methanol.

The study was led by the University of Southern California professors G. K. Surya Prakash and George A. Olah and was published in the Journal of the American Chemical Society.

“Direct CO₂ capture and conversion to methanol using molecular hydrogen in the same pot was never achieved before. We have now done it!” Prakash says.

Methanol is especially attractive because of its use as an alternative fuel in fuel cells and for hydrogen storage. Some believe that methanol is the future, with 70 million tons already being produced annually via the production of plastics.

This from Phys.org:

In the new study, the researchers developed a stable catalyst based on the metal ruthenium that does not decompose at high temperatures. The catalyst’s good stability allows it to be reused over and over again for the continuous production of methanol.

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